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Hybrid breeding in wheat
Jochen C. Reif
Leibniz Institute of Plant Genetics and Crop Plant Research
(IPK)
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Advantages of hybrids versus line varieties
• Enhanced yield stability• Increased abiotic and biotic stress
resistance• Yield increase due to exploitation of heterosis
Female parent Male parent
Hybrid
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Public-private partnership for hybrid wheat research
Plant material:120 female and 15 male lines have been crossed
using a factorial mating design. From 1.604 (89%) hybrids enough
seed was harvested for phenotyping.
Zhao et al. 2013
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Diverse sample of 135 parents
Gowda et al. 2013
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Phenotyping at multi-location field trials
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Hybrids are more yield stable than lines
Mühleisen et al. 2013
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Increased abiotic and biotic stress resistance
Longin et al. 2013
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Hybrids show high commercial heterosis
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Strong demand for methods to predict hybrid performance
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Predicting F1 with midparent performance
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Genomic selection (GS)
1 Training Population Phenotyping GS Model: μEstimate marker
effect:
Untested genotype
Genotyping
Predict genomic values:
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Cross-validation
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Predicting grain yield performance
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GS versus midparent based F1 prediction
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Traits, which are difficult to phenotype
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Hybrid wheat breeding using GS
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17
Marker-assisted hybrid wheat breeding
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Dominance effects in wheat
Gowda et al. Heredity doi 10.1038/hdy.2013.139.
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Exploiting dominance in hybrids
Gowda et al. Heredity doi 10.1038/hdy.2013.139.
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Summary
Hybrid wheat is a promising approach to increase grain yield,
yield stability, and abiotic and biotic stress resistance
Genomic selection is a valuable tool to predict hybrid
performance
Marker-assisted selection enables a sophisticated exploitation
of dominance effects
Female parent Male parent
Hybrid
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Thank you for your interest!
Pictures: Frank Schröder
KWS LOCHOW GmbH:Erhard Ebmeyer, Viktor Korzun, Sonja Kollers
Lantmännen SW Seed Hadmersleben GmbH:Ebrahim Kazman
Nordsaat Saatzuchtgesellschaft mbH:Ralf Schachschneider, Martin
Kirchhoff
Limagrain GmbH:Johannes Schacht, Jean-Pierre Martinant
University of Hohenheim:Friedrich Longin, Manje Gowda,Jonathan
Mühleisen
IPK:Yusheng Zhao, Florian Mette
